Hvac Systems Duct Design

The duct system types that lend themselves to attic installations include the extended plenum the reduc ing trunk and the radial arrangements.

Hvac systems duct design.

The rectangular duct therefore requires more metal for its construction this adds more weight and costs to the design. Hvac is an acronym for heating ventilation and air conditioning. The fourth edition of hvac systems duct design presents the basic methods and procedures required to design hvac air distribution systems. Adapt the design to the type of unit.

Design master hvac is an integrated hvac building design and drafting program that runs on top of autocad. Duct sizing calculations include constant pressure drop constant velocity and static regain. In addition to the basic engineering guidelines for the sizing of hvac ductwork systems the manual also provides related information on. One on a concrete slab.

The responsibilities of the hvac designer to review the data supplied and point out problems that may adversely affect the hvac design or the building operation. The ductwork sheet metal duct in this style home is usually fairly easy and straight forward. Number one is the heating and cooling load calculation using a protocol like acca s manual j or the ashrae handbook of fundamentals. This manual provides the hvac system designer detailed information on duct design and u s.

Designing a duct system is important but there are a few critical steps that come first. You ve got to know how much heating and cooling you need for each room in btu hr. A round duct with a cross sectional area of 0 6m2 has a perimeter of 2 75m. A rectangular duct with an equal cross sectional area has a perimeter of 3 87m.

However great care must be taken when installing a flexible duct system. Do it yourself hvac. Smacna in keeping with its policy of disseminating information and providing standards of design and construction offers this comprehensive and fundamental hvac systemsduct design manual as part of the continuing effort to upgrade the heating ventilating and air conditioning hvac industry. The base sheet should be prepared chapter 11 as soon as the architect s floor plan is received.

Materials methods of construction economics of duct. The sheet metal and air conditioning contractors national association inc. Sketch a rough design using a central supply duct from the unit to the opposite end of the house with branches forking to each outlet. Preliminary design œ decisions are made about the types of systems to be used.

In order to have a better understanding if these systems you need to know some of the principles behind hvac design. Round duct and rectangular duct comparison. Drafting features include single line and double line 2d ductwork with automatic fittings and 3d ductwork. Improper installation that allows sagging sharp bends kinks.

A wide vari ety of duct materials can be used with attic installations. The design a proper design must be performed to determine your furnace air conditioner and duct sizing. This is both a building system designed to keep the environment comfortable for building occupants and the industry that supports these systems.